Fix bug 1287644: Track revision ID as GA dimension12
Fix bug 1287644: Track revision ID as GA dimension12

yfdyh000/kuma,a2sheppy/kuma,jwhitlock/kuma,ollie314/kuma,Elchi3/kuma,yfdyh000/kuma,yfdyh000/kuma,ollie314/kuma,SphinxKnight/kuma,SphinxKnight/kuma,safwanrahman/kuma,Elchi3/kuma,mozilla/kuma,ollie314/kuma,safwanrahman/kuma,jwhitlock/kuma,mozilla/kuma,jwhitlock/kuma,yfdyh000/kuma,Elchi3/kuma,SphinxKnight/kuma,ollie314/kuma,Elchi3/kuma,SphinxKnight/kuma,SphinxKnight/kuma,ollie314/kuma,safwanrahman/kuma,safwanrahman/kuma,Elchi3/kuma,a2sheppy/kuma,mozilla/kuma,yfdyh000/kuma,a2sheppy/kuma,safwanrahman/kuma,jwhitlock/kuma,mozilla/kuma,safwanrahman/kuma,jwhitlock/kuma,escattone/kuma,a2sheppy/kuma,ollie314/kuma,yfdyh000/kuma,SphinxKnight/kuma,a2sheppy/kuma,escattone/kuma,mozilla/kuma,escattone/kuma